Multiple-effect evaporating apparatus



Sept. 8, 1925. 1,552,562

J. F; KIRGAN MULTIPLE EFFECT E APORATING APPARATUS Filed July "12 1923 mm H INVENTOR John Elfo'vyan.

Patented Sept. 8, 1925.

UNITED STATES PATENT. OFFICE.

JOHN F. KIRG-AN, 0F PHILL IPSBUIR-G, NEW JERSEY, ASSIGNOB: T0 INGEBSOLL-RAND COMPANY, OF JERSEY CITY, NEW. JERSEY, A CORPORATION OF NEW JERSEY.

MULTIPLE-EFFECT EVAP ORATING APPARATUS.

Application filed July 12,

To all whom it may concern:

Be it known that 1, JOHN F. KIRGAN, a citizen of the United States, and a resident of Phillipsburg, county of Warren, and State of New Jersey, have invented a certain Multiple-Effect Evaporating Apparatus, of which the following is a specification, accompanied by drawings.

This invention relates to evaporating apparatus, but more particularly to multiple efiect apparatus, suitable for use inthe sugar industry in evaporating sugar syrup, but also applicable to the evaporating of other liquids, as desired.

The object of the invention is to enable multiple efiect evaporating apparatus to be more economically used with aPi'nain condenser, andwith an intercooler. or intercondenser connected to the main condenser and also to two stage evacuating apparatus.

By venting the steam box of the lastor final effect of the evaporating apparatus to a'separate two stage vacuum producing apparatus, independent of the main condenser and intercooler,the primary steam jets of theevacuator for the main condenser, and the main condenser itself, are relieved of this air and vapor leakage, so that a smaller vacuum pump may be used for evacuation.

In the copending application of Paul A. Bancel, Serial 'No. 644,130, filed June 8, 1923, to which I' am permitted to refer, the steam box of the last or final efiect of the evaporating apparatus is vented directly to the intercooler or inter-condenser, which is connected to themain condenser, but it has been found that in some instances the preferable arrangement is to vent" the steam box of -the last efl'ect to a separate and independent-two stage vacuum pump, in which a still lower vacuum may be economically maintained than required for the intercooler, but appreciably higher than the steam pressure in the last or final efi'ect of the series of ey-aporators.

The invention is shown in one of its pre ferred forms in the accom nying drawings, in which the figure is a iagrammatic side elevation of a multiple efi'ect evaporating apparatus embodying the, invention.

Referring to the drawings, a plurality of steam heated evaporators A are connected in series with each other, by connecting the steam and vapor outlet pipe B of each evaporator or effect, to the steam inlet .CV

. the last efi'ect.

1923. Serial No. 851,025.

Steam for heating in this instance a barometric oondenserE is connected to the steam outlet pipe F of The evaporators, A are of any suitable or standard construction, in which the syrup is heated in the lower tank portions forming liquid containing -compartments or chambers, and the sugar is withdrawn from thesechambers at the bottom outlets H. The main dischar e outlets from the steam boxes G may "connected-in any suitable manner (not shown) to evacuating apparatus.

The barometric condenser E may be of standard construction. An intercooler J whichmay be like that disclosed in IU. S. Patent No. 1,526,040, granted to Paul A. Bancel, February 10, 1925, for steam jet vacuum pump 1s connected to the main condenser by the pipe K and primary augiliary steam'box vents W for the purpose of venting non condensable gases are connected to a two stage evacuating apparatus or pump R, separate and independent from the mam conden'serE and intercooler J. The pump R is provided with the primary 'et orjets U and the secondary jet or. jets V, supplied with steam in any suitable manner. The jet U may have a steam connection 6 and the jet V may have a steam connection 0. Condensing water may be sup-- plied to the evacuating apparatus or pump R by means of the pipe as from any'suitable source, as for instance, from'the inlet pipe Q, of the maincondenser, and the water outlet from the pump R may conveniently be connected with the main standpipe of the main condenser. In the present instance, the auxiliary vents W are located at the lower portions of the evaporators A in the steambelts or boxes and the pipes X.

' from the vents W are connected to the common auxiliary vent-ipipeqY which is connected to the independent two stage evacuator R. In such construction, the pri- ,mary jet or jets-U are interposed in the common Vent pipe line. Ya

I claim:

Multiple efiect evaporating apparatus,-

comprisinga plurality of steam heated evaporatorsconnected in series and having steam boxes, in'combination with a main condenser for said series of evaporators having an intercool'er connected thereto, main evacuating apparatus connected to said intercooler, a two-stage 'evacuator separate and independent from the main. condenser and intercooler, and capable of pro- 'ducing 'a'vacuum appreciably higher than vapors from the steam box of the said last efi'ect into the said independent evacuating apparatus.

In testimony whereof I have signed this specification.

JOHN F. KIRGAN 

